=== modified file 'bootloader/ipod.c'
--- bootloader/ipod.c	2008-12-03 21:15:44 +0000
+++ bootloader/ipod.c	2008-12-30 20:07:21 +0000
@@ -229,7 +229,7 @@
     int i;
     int btn;
     int rc;
-    bool haveretailos;
+    bool haveramos;
     bool button_was_held;
     struct partinfo* pinfo;
     unsigned short* identify_info;
@@ -319,8 +319,8 @@
         } else if (rc == EFILE_NOT_FOUND) {
             /* If apple_os.ipod doesn't exist, then check if there is an Apple 
                firmware image in RAM  */
-            haveretailos = (memcmp((void*)(DRAM_START+0x20),"portalplayer",12)==0);
-            if (haveretailos) {
+            haveramos = (memcmp((void*)(DRAM_START+0x20),"portalplayer",12)==0);
+            if (haveramos) {
                 /* We have a copy of the retailos in RAM, lets just run it. */
                 return (void*)DRAM_START;
             }
@@ -346,14 +346,22 @@
     } else {
         printf("Loading Rockbox...");
         rc=load_firmware(loadbuffer, BOOTFILE, MAX_LOADSIZE);
-        if (rc < EOK) {
-            printf("Error!");
-            printf("Can't load " BOOTFILE ": ");
-            printf(strerror(rc));
-        } else {
+        if (rc == EOK) {
             printf("Rockbox loaded.");
             return (void*)DRAM_START;
+        } else if (rc == EFILE_NOT_FOUND) {
+            /* if rockbox.ipod doesn't exist, then check if there is a Rockbox
+               image in RAM  */
+            haveramos = (memcmp((void*)(DRAM_START+0x20),"Rockbox\1",8)==0);
+            if (haveramos) {
+                /* We have a copy of Rockbox in RAM, lets just run it. */
+                return (void*)DRAM_START;
+            }
         }
+
+        printf("Error!");
+        printf("Can't load " BOOTFILE ": ");
+        printf(strerror(rc));
     }
     
     /* If we get to here, then we haven't been able to load any firmware */

=== modified file 'firmware/target/arm/crt0-pp.S'
--- firmware/target/arm/crt0-pp.S	2008-12-11 01:48:31 +0000
+++ firmware/target/arm/crt0-pp.S	2008-12-30 19:48:25 +0000
@@ -82,7 +82,12 @@
     msr    cpsr_c, #0xd3 /* enter supervisor mode, disable IRQ/FIQ */
     b      pad_skip
 
-.space 64*4 /* (more than enough) space for exception vectors and mi4 magic */
+.space 6*4  /* pad to offset 0x20 */
+
+    .ascii "Rockbox"    /* signature for bootloader checking osos */
+    .byte 1             /* osos boot version, only 1 exists for now */
+
+.space 56*4 /* (more than enough) space for exception vectors and mi4 magic */
 
 pad_skip:
     /* Find out which processor we are - r0 should be preserved for the